食品工廠之原料用水重金屬含量調查

HEAVY METAL CONTENTS OF WATER IN FOOD PROCESS FACTORIES IN TAIWAN

為了解食品工廠原料用水之重金屬含量，從臺灣北區（33）件，中區（44件），及南區（33件）之食品工廠收集檢體共110件，重金屬檢驗包括鉛、銅、鎘、砷、汞等五種，自民國78年7月至79年6月由臺灣省政府衛生處稽查人員於全省各地區食品工廠抽驗，用PE瓶裝該廠用來加工食品之用水2公升，檢驗方法參照衛生署公告。重金屬鉛、銅、鎘檢驗應用graphite atomizer analysis，檢體之乾燥、灰化、原子化均於石墨槽中進行，其最低檢出量（以signal/noise = 2） 分別如下：鉛2ppb，銅3ppb，鎘1ppb（1mg/l=1000ppb）。砷及汞則應用hydride formation system予以定量，其最低檢出量（以signalfnoise= 2） 分別為砷28ppb，汞4ppb。檢驗結果如有低於上述最低檢出量者則以未檢出表示之。

In order to monitor the heavy metalcontents of water used in local food plants, a hundred and ten water samples were collected from factories in the northern, central and southern area of Taiwan during the period from July 1989 to June 1990. Quantitative analysis of lead, copper and cadmium were tested by the atomic absorption spectrophotometry (AAS) with graphite atomizer, whereas contents of mercury and arsenic were measured by AAS with hydride formation system. Among the total number of 110 samples, there were 55, 62, 63, 79 and 59 water used in the food factories containing lead, copper, cadmium, arsenic and mercury respectively. The detected concentrations of heavy metals in water samples were lead at 3-13 ppb, copper at 4-386 ppb, cadmium at 1-11 ppb, arsenic at 2-120 ppb and mercury at 1-13ppb. The results indicated that the mercury content of water needed for further investigation.